Experimental inspection of a computationally-designed NiCrMnSi Heusler alloy with high Curie temperature

Yuta Onodera; Kelvin Elphick; Takuro Kanemura; Tufan Roy; Tomoki Tsuchiya; Masahito Tsujikawa; Kenta Yoshida; Yasuyoshi Nagai; Shigemi Mizukami; Atsufumi Hirohata; Masafumi Shirai

doi:10.35848/1347-4065/ab9c75

Experimental inspection of a computationally-designed NiCrMnSi Heusler alloy with high Curie temperature

Yuta Onodera, Kelvin Elphick, Takuro Kanemura, Tufan Roy, Tomoki Tsuchiya, Masahito Tsujikawa, Kenta Yoshida, Yasuyoshi Nagai, Shigemi Mizukami, Atsufumi Hirohata, Masafumi Shirai

Electronic Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Nowadays advanced magnetic tunnel junction applications demand very high tunnel magnetoresistance at room temperature, thus it is quite important to explore high Curie temperature Tc half-metallic Heusler alloys. In this article rst-principles calculation unveiled that NiCrMnSi has Tc of 1200 K comparable to that of the traditional Co2MnSi Heusler alloys, even though it does not contain Co element. In addition, we examined whether NiCrMnSi Heulser phase lms can be obtained by a magnetron sputtering on MgO substrates. The results of the structural analysis and rst-principles calculations indicated that NiCrMnSi Heusler phase is metastable. A possible route to obtain metastable NiCrMnSi Heusler alloy is to utilize appropriate templates.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Japanese Journal of Applied Physics
Volume	59
Issue number	7
Early online date	29 Jun 2020
DOIs	https://doi.org/10.35848/1347-4065/ab9c75
Publication status	E-pub ahead of print - 29 Jun 2020

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10.35848/1347-4065/ab9c75

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© 2020 The Japan Society of Applied Physics. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy.
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Onodera, Y., Elphick, K., Kanemura, T., Roy, T., Tsuchiya, T., Tsujikawa, M., Yoshida, K., Nagai, Y., Mizukami, S., Hirohata, A., & Shirai, M. (2020). Experimental inspection of a computationally-designed NiCrMnSi Heusler alloy with high Curie temperature. Japanese Journal of Applied Physics, 59(7), 1-6. Advance online publication. https://doi.org/10.35848/1347-4065/ab9c75

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AU - Onodera, Yuta

AU - Elphick, Kelvin

AU - Kanemura, Takuro

AU - Roy, Tufan

AU - Tsuchiya, Tomoki

AU - Tsujikawa, Masahito

AU - Yoshida, Kenta

AU - Nagai, Yasuyoshi

AU - Mizukami, Shigemi

AU - Hirohata, Atsufumi

AU - Shirai, Masafumi

PY - 2020/6/29

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AB - Nowadays advanced magnetic tunnel junction applications demand very high tunnel magnetoresistance at room temperature, thus it is quite important to explore high Curie temperature Tc half-metallic Heusler alloys. In this article rst-principles calculation unveiled that NiCrMnSi has Tc of 1200 K comparable to that of the traditional Co2MnSi Heusler alloys, even though it does not contain Co element. In addition, we examined whether NiCrMnSi Heulser phase lms can be obtained by a magnetron sputtering on MgO substrates. The results of the structural analysis and rst-principles calculations indicated that NiCrMnSi Heusler phase is metastable. A possible route to obtain metastable NiCrMnSi Heusler alloy is to utilize appropriate templates.

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